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SFSimone Festacertosinolab.hashnode.dev1d ago · 7 min read

Stop Writing has() + get() + set() — JavaScript Has a Better Way

If you've ever used a JavaScript Map, there's a good chance you've written something like this: if (!users.has(id)) { users.set(id, createUser(id)); } const user = users.get(id); The intention is

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SFSimone Festacertosinolab.hashnode.dev1d ago · 6 min read

JavaScript Object vs Map: When Should You Use Each?

JavaScript gives us more than one way to store key-value data. The most obvious one is an object: const user = { name: "Mario", age: 30, role: "admin" }; But JavaScript also has Map: const user

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SFSimone Festacertosinolab.hashnode.dev2d ago · 9 min read

JavaScript Finally Fixed Summation — But 0.1 + 0.2 Is Still Broken

If you've written JavaScript for more than five minutes, you've probably seen this: 0.1 + 0.2 // 0.30000000000000004 It has become one of those JavaScript jokes we all know. But in 2026, JavaScript g

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IHIslam Hafezislamhafez.hashnode.devJul 13 · 14 min read

JavaScript ES2026 Is Not a Feature Drop. It's a 30-Year Debt Payment.

TC39 didn't ship new features. They fixed embarrassments. Here's what broke, why it stayed broken, and what finally changed. Let's be honest about something most "ES2026 features" posts won't say: al

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SNSrekaravarshan N Ksrekaravarshan.hashnode.devMay 26 · 29 min read

Part 3: Block Scope and the Two Pointers That Disagree

The JavaScript Environment Model — Part 3 of 4. By the end of this post you'll know exactly when the EC's two pointers diverge, why they were designed that way, and why "var is function-scoped, let is

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ASAbhigna Sriramojuconsole-diaries.hashnode.devApr 25 · 6 min read

How JavaScript Pinpoints Errors: It Starts with the Lexer

Every developer has seen this at least once:SyntaxError: Unexpected token at line 32, column 2 JavaScript isn’t running your code yet.So how does it already know exactly where things went wrong? The a

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RTRachit Tanejajswithrachit.hashnode.devFeb 16 · 5 min read

Why Does JavaScript Exist? A Deep Dive into Web History.

Imagine it is 1995 and you hit a url of a website , it takes 3 minutes just for the site to load. Now what are the chaces of you waiting for that much amount of time. As we know our attention span is cooked up by watching reels and shorts.But a 10-da...

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AAabhishek aadarshshhekk.hashnode.devJan 14 · 4 min read

which module to choose nodenext or esnext

Lets Understand what is nodenext and esnext which you usually find in tsconfig.json but don't know what these options actually does. Before that you must have a basic understanding of esm and cjs. In .js file if something is being exported, it become...

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OJOyiguh Jordan Anibejordananibe.hashnode.devNov 17, 2025 · 2 min read

Day 22 – Strict Mode, ES Script & Core JavaScript Concepts

Hey folks 👋 Today at Cudose Creative Agency, we explored some foundational JavaScript concepts that sharpen how we write and interpret code. From strict mode to arguments, parameters, and Automatic Semicolon Insertion (ASI) — --- 📚 What We Covered ...

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ASAndreas Schommeraschommer.hashnode.devNov 8, 2025 · 4 min read

JsLog JavaScript Logging Libary

Introduction I recently experimented with kaplay, a lightweight JavaScript framework for game development. While debugging lag compensation issues, I found that console.log wasn't sufficient. Since it logs output every frame (60 times a second), it b...

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Trending tags this week

Stop Writing has() + get() + set() — JavaScript Has a Better Way

JavaScript Object vs Map: When Should You Use Each?

JavaScript Finally Fixed Summation — But 0.1 + 0.2 Is Still Broken

JavaScript ES2026 Is Not a Feature Drop. It's a 30-Year Debt Payment.

Part 3: Block Scope and the Two Pointers That Disagree

How JavaScript Pinpoints Errors: It Starts with the Lexer

Why Does JavaScript Exist? A Deep Dive into Web History.

which module to choose nodenext or esnext

Day 22 – Strict Mode, ES Script & Core JavaScript Concepts

JsLog JavaScript Logging Libary